Drainage from Level and Sloping Land.

摘要

A sand tank model study of drainage by pipe drains on level and sloping land was made in a 60-ft long, 2-ft wide, and 2-1/2-ft deep flume. The flume could be tilted to a 12 percent slope. Theoretical equations developed for steady-state drainage conditions on level land were verified. The study showed that drain spacing formulas developed for level land can be used for spacing midslope drains on sloping land which has a shallow impermeable barrier. Computer programs using verified formulas to determine drain spacing and maximum water table height between drains were developed a checked with data obtiained from the flume study. The time-sharing computer porgrams have been entered into the Bureau of Reclamation Engineering Computer System (BRECS). (Author)